Kongou

As a wise and stoic mentor to the Lustrous, this powerful instructor possesses the immense strength required to repel Lunarian invaders with a solitary strike. Though he typically maintains a silent, deadpan demeanor to mask his true feelings, his direct way of speaking reveals a deeply caring soul. He feels a profound sense of responsibility for the Gems, often burdened by intense guilt whenever they suffer harm or fall prey to the Lunarian forces.